Bird ringing, using numbered small metal leg rings to track birds;
For his Pulitzer-nominated book Living on the Wind: Across the Hemisphere With Migratory Birds, the author took to longtime systematic observation, which included the ornithological technique of banding, and observing the birds, besides the author talked to various experts—as well as amateur birders and ornithologists who have made many of the important discoveries about bird biology.
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Johannes Thienemann (12 November 1863 – 12 April 1938) was a German ornithologist and a pioneer bird bander who established the Rossitten Bird Observatory, the world’s first.
The Center develops and manages national inventory and monitoring programs and is responsible for the North American Bird Banding Program and leadership of other national bird monitoring programs.